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Título: | Temporal genetic structure of major dengue vector Aedes aegypti from Manaus, Amazonas, Brazil |
Autor: | Mendonça, Barbara Alessandra Alves Sousa, Adna Cristina Barbosa de Souza, A. P. de Scarpassa, Vera Margarete |
Palavras-chave: | Rain Microsatellite Dna Allele Dengue Fever Disease Control Disease Vector Entomology Gene Flow Genetic Structure Population Bottleneck Genetics, Population Aedes Aegypti Allele Population Bottleneck Breeding Dengue Gene Flow Gene Locus Gene Vector Polymorphism, Genetic Genetic Variability Microsatellite Marker Neighborhood Nonhuman Population Abundance Population Genetic Structure Seasonal Variation Species Extinction Urban Population Aedes Animals Classification Disease Carrier Gene Flow Genetic Variability Genetics Growth, Development And Aging Human Season Transmission Amazonas Manaus Aedes Animal Dengue Gene Flow Genetic Structures Genetic Variation Humans Insect Vectors Microsatellite Repeats Seasons Urban Population |
Data do documento: | 2014 |
Revista: | Acta Tropica |
É parte de: | Volume 134, Número 1, Pags. 80-88 |
Abstract: | In recent years, high levels of Aedes aegypti infestation and several dengue outbreaks with fatal outcome cases have been reported in Manaus, State of Amazonas, Brazil. This situation made it important to understand the genetic structure and gene flow patterns among the populations of this vector in Manaus, vital pieces of information for their management and development of new control strategies. In this study, we used nine microsatellite loci to examine the effect of seasonality on the genetic structure and gene flow patterns in Ae. aegypti populations from four urban neighborhoods of Manaus, collected during the two main rainy and dry seasons. All loci were polymorphic in the eight samples from the two seasons, with a total of 41 alleles. The genetic structure analyses of the samples from the rainy season revealed genetic homogeneity and extensive gene flow, a result consistent with the abundance of breeding sites for this vector. However, the samples from the dry season were significantly structured, due to a reduction of Ne in two (Praça 14 de Janeiro and Cidade Nova) of the four samples analyzed, and this was the primary factor influencing structure during the dry season. Genetic bottleneck analyses suggested that the Ae. aegypti populations from Manaus are being maintained continuously throughout the year, with seasonal reduction rather than severe bottleneck or extinction, corroborating previous reports. These findings are of extremely great importance for designing new dengue control strategies in Manaus. © 2014 Elsevier B.V. |
DOI: | 10.1016/j.actatropica.2014.02.014 |
Aparece nas coleções: | Artigos |
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